/*******************************************************************************
 * Copyright (c) 2017, 2018 THALES GLOBAL SERVICES.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *   
 * Contributors:
 *    Thales - initial API and implementation
 *******************************************************************************/

package ms.design;

import java.util.HashSet;
import java.util.Set;

import org.eclipse.sirius.business.api.componentization.ViewpointRegistry;
import org.eclipse.sirius.viewpoint.description.Viewpoint;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;

/**
 * The activator class controls the plug-in life cycle
 */
public class Activator extends AbstractUIPlugin {
  // The plug-in ID
  public static final String PLUGIN_ID = "ms.design"; //$NON-NLS-1$

  // The shared instance
  private static Activator plugin;

  private static Set<Viewpoint> viewpoints;

  /**
   * The constructor
   */
  public Activator() {
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
   */
  public void start(BundleContext context) throws Exception {
    super.start(context);
    plugin = this;
    viewpoints = new HashSet<Viewpoint>();
    viewpoints.addAll(ViewpointRegistry.getInstance().registerFromPlugin(PLUGIN_ID + "/description/ms.odesign")); //$NON-NLS-1$
  }

  /*
   * (non-Javadoc)
   * 
   * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
   */
  public void stop(BundleContext context) throws Exception {
    plugin = null;
    if (viewpoints != null) {
      for (final Viewpoint viewpoint : viewpoints) {
        ViewpointRegistry.getInstance().disposeFromPlugin(viewpoint);
      }
      viewpoints.clear();
      viewpoints = null;
    }
    super.stop(context);
  }

  /**
   * Returns the shared instance
   * 
   * @return the shared instance
   */
  public static Activator getDefault() {

    return plugin;
  }
}
